Circuit-controlling device.



M. M. KANDLB.

CIRCUIT CONTROLLING DEVICE.

APPLICATION FILED NOV. 6, 1912.

WITNESSES: IVVENTOR,

ATTORNEY.

PATENT OFFICE.

MATTHIAS M. KANDLROF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR T0 .KANDLE- BORN COMPANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSA- GHUSETTS.

CIRCUIT-CONTROLLING DEVICE.

invention is to provide a device of this class a with a sensitive element arranged to. give the desired openingand closing of the circuit, and more especially the object of the invention is to provide such a device with means for readily fixing the degree of sensitiveness according to conditions desired for closing and opening the circuit.

The embodiment of my invention chosen for the purposes of illustrating the same will now be described in connection with the drawings, in which- 1 Figure 1 is a plan view of the circuit controller. Fig. 2 is a rear elevation of the same. Fig. 3 is a sectional view taken on line 33 of Fig. 2.

I have found this invention particularly useful in its application to electrical stop motions for printing presses where it is desired to stop the press whenever a sheet to be printed is. not properly fed. The invention has in the embodiment shown been mounted on a flat metal plate a suitably attached to the press. A block of insulating material olS attached to plate a. Within a slot in the plate a there is mounted for rocking movement on metal pivot it ELIIaIIII g. This a... can be rocked so that the front top surface aiereof lies either above or below the surface of plate a. As shown in Fig. 3 arm 9 is at its extreme upper limit. The arm is preferably struck up from sheet metal stock and has a downwardly extend ing flange on the short arm in the rear of pivot h. To this flange one end of a spring y is attached (see Fig. 3) the other end being attached to block k as shown. The spring tends to turn the arm g above the surface of plate a. This turning movement can be regulated or adjusted to some extent by bending the downwardly extending flange toward or away from the pivot 71. where the Specification of Letters Patent.

Application filed November 6, 1912.

Patented Nov. 1'7, 1914.

Serial No. 729,713.

regulating thumb screw by with a wedge shaped or pointed end is mounted in front oil. and above stop pin (Z. \Vhen screw Z) is turned inwardly, terminal c is forced to its back limit and when screw 1) is turned outwardly, terminal 6 moves to its front limit and at the same time forces arm g, since it is. stronger than spring 9', downwardly due to its contacting j back of and above, pivot h. Thus by adjusting thumb screw 2), the position of the outer end of arm g above or below plate a is fixed with a fine degree of adjustment.

The pivot h on which arm 9 is mounted is so arranged that on the least movement downwardly of the outer end of arm 9 the point on the rear thereof contacting with terminal 6 immediately leaves its contacting position with a. While the general arrangement shown, as in Fig. 3, has been found to give satisfactory results it is clear that were the normal contacting point between 5/ and 6 directly above pivot point k, the connection would break on the smallest possible movement of arm 9 for the contacting point on arm 9 would move in a perpendicular direction to the contacting surface of terminal a. I include such a structure in my disclosure because theoretically it would give perfect results for my purpose. I find that the form shown is easier to make and gives the practical results desired. If it should be desired to get closer results, the normal con.- tacting position for arm 9 and terminal 6 can be arranged directly over pivot h.

The specific operation of the circuit controlling device shown for illustration is as follows: One terminal of an electric circuit is connected by wire on with a binding screw against which the pivot screw C abuts. This forms a path from binding screw to terminal e. The other terminal of the circuit is the metal plate a which is connected to arm g by metal pivot h. When the parts have been adjusted as desired the edge of a sheet ins of paper as fed to the printing press squares against the plate a, and forces the end of arm 51 level with the plate which breaks the circuit by means described. The arm 9 can be adjusted so that if the paper does not square properly against plate a, the circuit will notbe broken. This result can be, used to stop the press or ring an alarm by Well known arrangements.

While I have described my invention in its preferred form; I have done so only for" purposes of illustrating the principles there of and not with any intention of limiting the broad invention to the specific form shown.

arranged so that a pressure onthe long end of the pivoted terminal will cause the short end to move away from the adjusted terminal. 4

2. In combination, a fiat metal plate, a

tened at one end to the block and acting at i the other end to press against the pivoted terminal to turn it against its spring, and an adjusting memberarranged to limit the movement of the second terminal and thereby adjust the position of the long end of the first terminal with relation to the flat metal plate. p

3. In a circuit controlling device, the com bination, a slotted gage plate against which an article to be accurately located is placed, a contact member pivotally secured to the plate and having its free end located within the slot, a second contact member normally in engagement with the first contact member, means to adjust the second contact memher to cause the first member to move relative to the face of the plate, and a spring to maintain the first member in contact with the second member. M r r y MATTHIAS M; KANDLE. Witnesses:

FRANKLIN Gr. NEAL, HARRY W. BOWEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Z'Patehts Washington, D. G. I 

